Dyfyniad APA

Medina, S. (2010). Helping Around the World. Oxford: Oxford University Press.

Dyfyniad Arddull Chicago

Medina, Sarah. Helping Around the World. Oxford: Oxford University Press, 2010.

Dyfyniad MLA

Medina, Sarah. Helping Around the World. Oxford: Oxford University Press, 2010.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.